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United States Patent | 5,201,955 |
Chika ,   et al. | April 13, 1993 |
A system is provided for tinting eyeglass lenses wherein the lenses are engaged in a frame which is both vertically reciprocated and simultaneously rotated about on an axis central to and orthogonal to the plane of the lens so that an annular gradient tint is produced darker at the outside edges of each lens and becoming progressively lighter toward the center, with the optical center of the lens either being completely clear or substantially lighter than the rest of the lens.
Inventors: | Chika; Hani E. (4521 Park Blvd., San Diego, CA 92116); Elias; Tariq J. (7358 Margerum Ave., San Diego, CA 92120) |
Appl. No.: | 667175 |
Filed: | March 11, 1991 |
Current U.S. Class: | 118/416; 118/425; 118/503; 134/157 |
Intern'l Class: | B05C 003/09 |
Field of Search: | 118/416,503,52,53,425 134/76,149,157 279/66 269/254 CS |
243107 | Jun., 1881 | Conger | 118/503. |
1281762 | Oct., 1918 | Carpenter | 118/503. |
1404309 | Jan., 1924 | McDonald | 118/416. |
2824029 | Feb., 1958 | Zinty | 118/53. |
4317427 | Mar., 1982 | Turner | 118/503. |
4915986 | Apr., 1990 | Elias et al. | 118/705. |
Foreign Patent Documents | |||
2821192 | Nov., 1979 | DE | 118/416. |
273023 | Nov., 1989 | DD | 269/254. |
231736 | Jul., 1944 | CH | 269/254. |
2208322 | Mar., 1989 | GB | 118/503. |